Decantation
Distillation
Evaporation
Filtration
Correct answer is B
No explanation has been provided for this answer.
From the following ores is iron extracted? I. Haematite ll. Bauxite III. Magnetite IV. Cassiterite
l and ll only
l and lll only
l, ll and lll only
l, ll, lll and lV
Correct answer is B
No explanation has been provided for this answer.
Glucose reduces Fehling's solution on warming to
copper (l) oxide
copper (ll) oxide
copper (l) chloride
copper (ll) hydroxide
Correct answer is A
No explanation has been provided for this answer.
Which of the following compounds reacts readily with sodium to liberate hydrogen?
CH3CH2CH3
CH3COOH
CH3 CH2CHO
CH3 CH(OH)CH3
Correct answer is B
No explanation has been provided for this answer.
drugs
margarine
paraffin wax
soapy detergents
Correct answer is B
This is called hydrogenation. It includes the manufacture of margarine from animal or vegetable fats and oils.
Ethene reacts with hydrogen in the presence of a finely divided nickel catalyst at a temperature of about 150°C. Ethane is produced.